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There's a box sitting on a plank. The coefficient of static friction is 0.33. I want to figure out at which angle the box will begin to slide if the plank is tilted.

I know the factors that come into play are FN, Fg or Fgx, and Fs.

So far I have

Fnet= FN-Fs-Fg

=FN- μs-sin∅

=cos∅-0.33-sin∅

This doesn't look right... can anyone help me out?

I know the factors that come into play are FN, Fg or Fgx, and Fs.

So far I have

Fnet= FN-Fs-Fg

=FN- μs-sin∅

=cos∅-0.33-sin∅

This doesn't look right... can anyone help me out?

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